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How long will it take an object that falls from rest to attain a velocity of 147 m/s?
15 s
How long will it take an object that falls from rest to attain a velocity of 147 m/s?
15 s
The cheetah, which is the fastest land mammal, can accelerate from 0.0 mi/hr to 70.0 mi/hr in 3.0 seconds. What is the acceleration of the cheetah (in units of mph/sec)?
23.3 mph/s
At exactly 2:00 pm, Speedy the Snail crawls onto a meter stick at the 10 cm mark. If he reaches the 65 cm mark at exactly 2:10 pm, what is his speed?
5.5 cm/min
If it takes Leaping Louie 5 minutes to jump 3 blocks, how long will it take for him to jump 15 blocks?
46 min
A race car’s forward velocity increases from 4.0 m/s to 36 m/s over a 4.0-s time interval. What is its average acceleration?
8.0 m/s^2
A car is coasting backwards downhill at a speed of 3.0 m/s when the driver gets the engine started. After 2.5 s, the car is moving uphill at 4.5 m/s. If uphill is chosen as the positive direction, what is the car’s average acceleration?
3.0 m/s^2
A car traveling at a speed of 30.0 m/s encounters an emergency and comes to a complete stop. How much time will it take for the car to stop if its deceleration is – 4.0 m/s^2?
7.5 s
At exactly 2:00 pm, Speedy the Snail crawls onto a meter stick at the 10 cm mark. If he reaches the 65 cm mark at exactly 2:10 pm, what is his speed?
5.5 cm/min
If Bert the Bat travels eastward at 40 mph with a tail wind of 6 mph, what is his actual speed?
46 mph
The race car in the previous problem slows from 36 m/s to 15 m/s over 3.0 s. What is its average acceleration?
-7.0 m/s^2
A canoeist paddles upstream at a velocity of 2.0 m/s for 4.0 s and then floats downstream at 4.0 m/s for 4.0 s. What is the average acceleration of the canoe during the 8.0-s time interval?
-0.75 m/s^2
A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s2. If the cart has a beginning speed of 2.0 m/s, what is its final speed?
22.0 m/s
Toon Train is traveling at the speed of 10 m/s at the top of a hill. Five seconds later it reaches the bottom of the hill and is moving at 30 m/s. What is the rate of acceleration of Toon Train?
4 m/s^2
Pete the Penguin loves to sled down his favorite hill. If he hits a speed of 50 m/s after 5 seconds, what is his rate of acceleration? Hint: He starts at 0 m/s at the top of the hill.
10 m/s^2
Calculate the speed for a truck that went a distance of 125 kilometers in 2 hours' time.
62 km/hr
Bob rides his bicycle on a path that is 75 kilometers long. If it takes him 15 hours, then what is his velocity?
5 km/hr
Goldie Goldfish, a speed swimmer, loves to race around the park’s pond, which is 0.5 miles around. If she can swim 20 laps around the track in 2 hours, what is her average speed?
5 mph
If a block of wood dropped from a tall building has a velocity of 78.4 m/s, how long has it been falling?
8 s
Monster Mike’s truck decelerates from 72 m/s to 0 m/s in 6 seconds. What is his rate of deceleration?
-12 m/s^2
How much time does it take for a bird flying at a speed of 45 kilometers per hour to travel a distance of 1,800 kilometers?
40 hr
Jessica jogs down a path that is 25 kilometers long. If it takes her 2.5 hours, then what is her speed?
10 km/hr
It takes Stu, a slimy slug, 20 minutes to travel from his favorite bush to the local trash can (a trip of 30 meters), how far can he travel in 1 hour (60 minutes)?
90 m
If a ball that is freely falling has a velocity of 19.6 m/s after two seconds, what is its velocity five seconds later?
68.6 m/s
A piece of metal has a velocity of 107.8 m/s after falling for 10 seconds. What is its initial velocity?
9.8 m/s